Originally Posted by LaTuFu
Have you tried doing a factory reset since you did the update?
It will wipe your phone and you'll have to reload all of your apps, but that may resolve the issue.
The only other suggestion I have at this point would be to take it in to a tech center at a USCC Store and have them reflash the update to your phone. That will also wipe your phone.
I have not tried a factory reset, at least not that I recall.. I'll do that now.